No lift to shift mod on stock ECU VIDEO!!!
From what I understand, the TPS Position is controlled by the ECU. You can program the ECU to let off the throttle when the clutch is stepped on. I'd imangine this would actually be less of a stress on the drivetrain in a 1/4 mile drag.
You wouldn't want that because it would shut the throttle plate.
Actually, our cars aren't drive-by-wire, so it wouldn't shut the throttle plate. There is a physical cable that connects the throttle plate and the gas pedal. You could possible shut off spark or injectors, but not physically shut the throttle plate by ECU manipulation.
Actually, our cars aren't drive-by-wire, so it wouldn't shut the throttle plate. There is a physical cable that connects the throttle plate and the gas pedal. You could possible shut off spark or injectors, but not physically shut the throttle plate by ECU manipulation.
I'm retarded you're absolutely correct.
what i dont understand is how all these people think its the same thing as power shifting....
its easier on the drivetrain because it cuts the revs to where they would normally be if you lifted to shift, except you now have full boost between shifts. when you powershift at 7500rpm or whatever, the car will drop rpms and then bulid back up when you let out the clutch. that intial shock when letting out the clutch will kill your transmission and clutch and rear diff.
i think everyone is confused because in the vid, he doesnt have the rpms set to drop a lot, so its just looks like hes powershifting.
its easier on the drivetrain because it cuts the revs to where they would normally be if you lifted to shift, except you now have full boost between shifts. when you powershift at 7500rpm or whatever, the car will drop rpms and then bulid back up when you let out the clutch. that intial shock when letting out the clutch will kill your transmission and clutch and rear diff.
i think everyone is confused because in the vid, he doesnt have the rpms set to drop a lot, so its just looks like hes powershifting.
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Joined: Mar 2003
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^ Well, the confusion was just the lack of a basic explanation of what was going on since all we could really get from the video was the gauge readings and engine sounds, while the first couple pages were full of posts just saying "I should get this."
i know its a confusing video....
it would be a lot better if someone would make one that shows the rpms dropping a little more...
i think people will then understand the concept a little more
it would be a lot better if someone would make one that shows the rpms dropping a little more...
i think people will then understand the concept a little more
To everyone who doesn't understand this mod...
The patch is equivalent to DSMLink's Clutch Cut... it is fuel cut as soon as you touch the clutch, as long as you are above the TPS and speed threshold.
What does this mean?
It means the throttlebody stays open and the intake mani doesn't drop into vacuum.
You are still revving the engine down, as fuel is cut... how much you rev the engine down is configurable in the ECU (as well as TPS and speed thresholds).
So the shock to the drivetrain is stock-like, in that the RPM is still coming down same as stock, the clutch engagement is still like stock... the difference is the amount of time it takes you to hit peak boost after a shift... that's it !!!
Also, the OP has the RPM drop set to 100rpm, so when he hits fuel cut, it only drops 100rpm (which takes basically no time at all) and then re-introduces fuel... so he has a very aggressive RPM drop setting which WILL introduce more shock to the drivetrain than stock. The default drop for this patch is 1500RPM. I will probably use 750RPM or 1000RPM.
The patch is equivalent to DSMLink's Clutch Cut... it is fuel cut as soon as you touch the clutch, as long as you are above the TPS and speed threshold.
What does this mean?
It means the throttlebody stays open and the intake mani doesn't drop into vacuum.
You are still revving the engine down, as fuel is cut... how much you rev the engine down is configurable in the ECU (as well as TPS and speed thresholds).
So the shock to the drivetrain is stock-like, in that the RPM is still coming down same as stock, the clutch engagement is still like stock... the difference is the amount of time it takes you to hit peak boost after a shift... that's it !!!
Also, the OP has the RPM drop set to 100rpm, so when he hits fuel cut, it only drops 100rpm (which takes basically no time at all) and then re-introduces fuel... so he has a very aggressive RPM drop setting which WILL introduce more shock to the drivetrain than stock. The default drop for this patch is 1500RPM. I will probably use 750RPM or 1000RPM.